Millclock IN-14 Single Digit Nixie Tube Clock Assembled with Clear Acrylic Enclosure and Adapter Warranty Time format: 12 / 24 time display Support 3 different Effects for displaying time Six-colored RGB LED mounted under the NIXIE tube. This LED can display any color with a lot of per-defined auto color change effects. Built-in battery socket, time backup during power interruptions Simple time setting by using 2 buttons